1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
; RUN: opt -S -passes=wholeprogramdevirt -whole-program-visibility %s | FileCheck %s
; Test that we correctly expand the llvm.type.checked.load intrinsic in cases
; where we cannot devirtualize.
target datalayout = "e-p:64:64"
target triple = "x86_64-unknown-linux-gnu"
@vt1 = constant [1 x ptr] [ptr @vf1], !type !0
@vt2 = constant [1 x ptr] [ptr @vf2], !type !0
define void @vf1(ptr %this) {
ret void
}
define void @vf2(ptr %this) {
ret void
}
; CHECK: define void @call
define void @call(ptr %obj) {
%vtable = load ptr, ptr %obj
%pair = call {ptr, i1} @llvm.type.checked.load(ptr %vtable, i32 0, metadata !"typeid")
%p = extractvalue {ptr, i1} %pair, 1
; CHECK: [[TT:%[^ ]*]] = call i1 @llvm.type.test(ptr [[VT:%[^,]*]], metadata !"typeid")
; CHECK: br i1 [[TT]],
br i1 %p, label %cont, label %trap
cont:
; CHECK: [[GEP:%[^ ]*]] = getelementptr i8, ptr [[VT]], i32 0
; CHECK: [[LOAD:%[^ ]*]] = load ptr, ptr [[GEP]]
; CHECK: call void [[LOAD]]
%fptr = extractvalue {ptr, i1} %pair, 0
call void %fptr(ptr %obj)
ret void
trap:
call void @llvm.trap()
unreachable
}
; CHECK: define { ptr, i1 } @ret
define {ptr, i1} @ret(ptr %vtablei8) {
; CHECK: [[GEP2:%[^ ]*]] = getelementptr i8, ptr [[VT2:%[^,]*]], i32 1
; CHECK: [[LOAD2:%[^ ]*]] = load ptr, ptr [[GEP2]]
; CHECK: [[TT2:%[^ ]*]] = call i1 @llvm.type.test(ptr %vtablei8, metadata !"typeid")
; CHECK: [[I1:%[^ ]*]] = insertvalue { ptr, i1 } poison, ptr [[LOAD2]], 0
; CHECK: [[I2:%[^ ]*]] = insertvalue { ptr, i1 } [[I1]], i1 [[TT2]], 1
%pair = call {ptr, i1} @llvm.type.checked.load(ptr %vtablei8, i32 1, metadata !"typeid")
; CHECK: ret { ptr, i1 } [[I2]]
ret {ptr, i1} %pair
}
declare {ptr, i1} @llvm.type.checked.load(ptr, i32, metadata)
declare void @llvm.trap()
!0 = !{i32 0, !"typeid"}
|
